L322 4.6 boiling

1998 4.6 runs perfect no loss of fluid but sit in a traffic jam a short time and she boils, had a new water pump recently, any ideas please its driving me mad

If its a p38 then your viscous fun is not working, you should be able to here it they roar when they are working.

1998 L322 ???

4.6 L322?

New water pump did you test the stat while you were in there ?

Its a p38 electric fan and thats cutting in ok, yes the thermostat was replaced and the rad isnt that old, think ill have the thermostat out and check it before anything else

P38s main cooling fan is driven off the water pump boss via a viscous clutch. If you're talking about an electric fan you're probably looking at the 2x aircon fans mounted behind the grille. These also come on as a backup if engine overheats, but are not efficient enough to use as sole source of cooling air.

^^^^^^^ what he said

No the viscous fan has been replaced with a electric fan, kenlowe i think with a thermostat and this does cut in ok

So, viscous replaced to try to hide an underlying issue then.
Why do people bugger about with what works well if you maintain it properly?

^^^^
So Wazz, you'd keep your wooden axle with pig fat lubrication even if a superior alternative came along?

There is no maintenance on a VC as you well know, only rolled up newspapers committing Hari Kari in pursuit of a place in confetti heaven.

myfirstl322 said:

^^^^
So Wazz, you'd keep your wooden axle with pig fat lubrication even if a superior alternative came along?

There is no maintenance on a VC as you well know, only rolled up newspapers committing Hari Kari in pursuit of a place in confetti heaven.

Click to expand...

Oi, what's wrong with wooden axles with pig fat grease, us series owners do ok with them.

Col

myfirstl322 said:

^^^^
So Wazz, you'd keep your wooden axle with pig fat lubrication even if a superior alternative came along?

There is no maintenance on a VC as you well know, only rolled up newspapers committing Hari Kari in pursuit of a place in confetti heaven.

Click to expand...

No, I wouldn't,but who says a kenlowe fan is superior to the factory fitted viscous fan.
On an engine that is notoriously sensitive to overheating, given the choice of driving the cooling fan with a 50watt electric motor or a 150kw ICE, I know what my preference would be.
You have to ask why a kenlowe fan was fitted?